Petrified Forest National Park weather in July
July in Petrified Forest National Park: sweltering, a little rain — one of the weakest months to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#12 of 12 months in Petrified Forest National Park · #1225 of 1413 destinations to visit in July · comfort 49/100 (tier F)
- Days
- 35°C
- Nights
- 17°C
- Wet days
- 6
- Sun
- 12.7 h
- Humidity
- 33%
- Daylight
- 14 h

Traveller notes on Petrified Forest National Park in July
Petrified Forest-forum threads on July weather confirm this sits inside the monsoon window, genuinely hot temperatures paired with afternoon-into-evening thunderstorms that can build fast over the Painted Desert. Posters recommend an early arrival, ideally before 10am, to see the main overlooks and short trails before both the heat and the storm risk peak later in the day. The park's semi-arid grassland setting means temperatures swing widely across the year - well over 100F in summer, well below zero in winter - and posters call July's storms a genuinely dramatic, photogenic feature of a visit rather than purely a hazard, provided a visitor isn't caught exposed on an overlook when lightning starts. Regulars call the drive-through loop road entirely doable in a half day even with a storm delay factored in. The record: 35.1C days feeling like a punishing 34C, 17.1C nights, a very low 33 percent humidity and 12.7 hours of sun.
Other months in Petrified Forest National Park
Petrified Forest-forum threads on a January visit describe closures as a genuine risk, one visitor planning a late-January trip finding the park actually closed due to icy roads. Regulars call snow genuinely not guaranteed in northern and central Arizona in January, several posters naming it a real possibility rather than a certainty. Posters call driving genuinely discouraged once roads turn snowy, several regulars naming this standard advice given how quickly conditions can shift here. Regulars call touring the park a real half-day commitment, several threads naming roughly four hours as typical for seeing the main sights. Posters recommend calling ahead before a January trip regardless of the forecast, several regulars calling this standard given how a single storm can close the park entirely. The record: 9.7C days, -4.9C nights, 17.1mm across nearly 4 days and 59 percent humidity.
Petrified Forest-forum threads on a February visit describe conditions as genuinely cold, posters calling a strong north or northwest wind capable of making an otherwise bright, sunny day feel miserable. Regulars call accumulation possible though not a major February factor, real caution still worth exercising given how fast conditions can shift. Posters recommend checking the forecast closely before setting out, several regulars describing this as standard practice for a February trip through the park. Regulars call the route through Globe and Salt River Canyon genuinely scenic for anyone approaching from that direction, though winter weather here can affect the drive. Posters recommend real layers regardless of how the morning looks, wind chill considered the real factor rather than the air temperature alone. The record: 13.3C days feeling like 12C, -3.1C nights, 16mm across over 2 days and 41 percent humidity.
Petrified Forest-forum threads on a mid-June visit describe two to three hours as genuinely enough for the main scenic drive and a few short walks, posters calling a full day only necessary for anyone wanting longer hikes like the Jasper Forest route. Regulars call the park a manageable add-on to a wider Southwest road trip, easy to combine with a same-day departure from somewhere like Mesa Verde. Posters describe June as running hot and exposed, real sun protection and water essential regardless of how short the visit. Regulars recommend an early start if any longer trails are on the itinerary, midday heat building fast with almost no natural shade anywhere. Posters call the Painted Desert section worth the detour, the colors more vivid in the softer morning or evening light. Regulars call checking visitor center hours worthwhile before planning arrival time. The record: 33.5C days feeling like 30C, 13.6C nights, a scant 1.3 days of measurable precipitation and 20 percent humidity.
Petrified Forest-forum threads asking about current conditions describe this semi-arid grassland park as capable of real temperature extremes, though by November posters call the air genuinely crisp and clean, comfortable in the forties and fifties Fahrenheit for a full day outside. Regulars describe winter as a real advantage for anyone avoiding crowds, virtually no lines and the same striking Painted Desert views without the summer heat. Posters call a light dusting possible at this elevation given the right system, though nothing like the accumulation a true mountain destination sees. Regulars recommend checking a current forecast before the trip given how variable conditions run. Posters call the petrified wood and painted badlands worth the visit regardless of exact temperature. Regulars recommend real layers for the sharp morning-to-afternoon swing typical of high desert. The record: 16.4C days feeling like 11C, -0.3C nights, a low 46 percent humidity and 9 hours of sun.
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Petrified Forest National Park climate normals — July
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Petrified Forest National Park in July
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySummer break in United States, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Petrified Forest National Park's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherPetrified Forest National Park's best weather comes in April, May and October — separate windows, not one continuous season.
July coincides with Monsoon thunderstorms.
Best weatherFair weatherToughest weather
What's on in Petrified Forest National Park in July
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
The gates lock at five
1 Jan – 31 DecClosuresThe park road is open 8am to 5pm and the gates are locked outside those hours, so sunrise and sunset in the Painted Desert need a free wilderness permit and a walk in. Arizona keeps Mountain Standard Time all year. Source ↗
- Nature
Dark-sky nights
1 Apr – 30 Sep · usuallyDark-sky seasonOne of the darker certified parks in the southwest, and the only way to use it is a free overnight permit into the Painted Desert wilderness, since the road gate closes at five. The park runs occasional star parties. Source ↗
- Hazard
Monsoon thunderstorms
1 Jul – 15 Sep · usuallyStorm seasonAfternoon storms build fast over the plateau from July, and the badlands offer no shelter from lightning on the trails at Blue Mesa or the Wilderness. The clay turns to grease within minutes of a downpour. Source ↗
Nearby, and something's on
Within 300 km of Petrified Forest National Park — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Petrified Forest National Park?
Petrified Forest National Park in July — FAQ
- Is July a good time to visit Petrified Forest National Park?
- July in Petrified Forest National Park: sweltering, a little rain — one of the weakest months to visit. It ranks #12 of 12 months for Petrified Forest National Park on SeasonMap's comfort score (49/100).
- What is the weather like in Petrified Forest National Park in July?
- In July, Petrified Forest National Park averages a daily high of 35.1°C and a low of 17.1°C, with about 36.6 mm of rain over roughly 5.5 rainy days.
- What is the air quality in Petrified Forest National Park in July?
- Petrified Forest National Park has a mean US Air Quality Index of about 56 in July.
Within 300 km: Mesa Verde National Park's Cliff dwelling tour season around 1 May – 20 Oct, and Grand Canyon National Park's North Rim season around 15 May – 15 Oct.